Backing up mail box

I am an Opera user since a decade and can't live without its' inbuilt mail feature. I have my own mail server setup and I use the IMAP protocol to send/receive mails via opera. Recently I've moved to Zoho mail to manage my emails and I successfully migrated the Inbox there. The problem is it didn't backed up my sent or any other folders except only the Inbox directory on the imap server. I have thousands of sent mails which I want to be migrated. The thing is Opera might not push the sent mails back to the server so it's not there. How can I did this job?

I am using opera 12.16 and don't want to upgrade to the latest because i don't like the approach to use chromium by dropping the independent opera engine. If people want to use chromium let them use chrome and create the existing engine more better and bug free instead of using some other's thing. That's my opinion anyway.

Are your sent folder correctly setup on the account's imap properties?

In my inbox there are some folders I saw like INBOX, INBOX.SENT, INBOX.DRAFT, INBOX.TRASH etc. You mean this? If yes, then How to connect them with opera accordingly.

Originally posted by LeoCG:

Hmm, i guess you can drag your messages into the imap's sent folder. Do it in little pieces to avoid Opera freezing.

Well, see this pic.

Only INBOX folder is subscribed. Should I subscribe them all and Opera will sync them from now on? I mean it will sync the sent option in opera with the server's INBOX.sent folder respectively? Also if I do so will it delete all the existing mails?

In my inbox there are some folders I saw like INBOX, INBOX.SENT, INBOX.DRAFT, INBOX.TRASH etc. You mean this? If yes, then How to connect them with opera accordingly.

I mean Mail Accounts > <select account> > Edit > Imap

Are all the fields correctly filled?

Originally posted by ankhd:

Only INBOX folder is subscribed. Should I subscribe them all and Opera will sync them from now on? I mean it will sync the sent option in opera with the server's INBOX.sent folder respectively? Also if I do so will it delete all the existing mails?

You need to subscribe or Opera will not be able to see your sent folder and, consequently, will not be able to sync it.